KR20030066430A - Device for pickling strip-shaped or wire-shaped material - Google Patents

Abstract

An apparatus for pickling a plate or wire rod according to the present invention is adapted to contact the pickling liquid 9 with a mechanism 2, 5, 7 for guiding a material of various loops having vertical partitions 4, 6. A mechanism 11 is provided.

In order to obtain a pickling effect that can be precisely defined and varied by changing or accurately setting the effective pickling length, even in the case of chemical pickling alone, while maintaining a structure that can save space of the equipment, each of the vertical lines 4, At least two vertical pickling cells 3, 3a having 6) are provided, each pickling cell 3, 3a being selective and independent of one another.

Description

Plate or Wire Pickling Device {DEVICE FOR PICKLING STRIP-SHAPED OR WIRE-SHAPED MATERIAL}

The present invention relates to a plate or wire pickling apparatus having a mechanism for guiding a loop-shaped material having a plurality of vertical partitions and a mechanism for contacting the material with a pickling solution.

This type of installation comprises, for example, a pickling tower which accommodates one or several vertically facing wires or plates and is equipped with a spray nozzle for spraying pickling medium onto the material. Known by the disclosed Austrian patent 206 247 B1. Austrian patent 218 331 B1 discloses a similar installation with a pickling tower, which is sprayed onto the pickling material through a concentric nozzle around the pickling material which is guided vertically in a loop. The pickling agent flows down the pickling agent. With these installations, pickling lengths can be made long while saving considerable space in terms of area occupied.

However, even when only chemical pickling is performed, it is necessary to obtain various pickling effects by changing the length of the pickling agent effectively acting on the plate, but this operation is impossible due to the fixed length occupied by the pickling material in the pickling tower described above. The same phenomenon occurs in conventional horizontal pickling plants in which the pickling material is supplied through a pickling tank filled with a pickling agent. For this reason, for example, in German Patent Publication 42 40 572 Al, a method of installing an additional spray nozzle in a pickling bath has been proposed to facilitate various selections. Therefore, it is impossible to very clearly distinguish between the region of weak pickling action and the region of strong pickling action, and it is impossible to treat below the minimum pickling length predetermined by the length of the pickling tank. As disclosed in US Pat. No. 4,807,653 B1, even if a horizontal pickling is provided with a series of continuous cells sealed by a roller carrying the pickle material, the parts are not completely separated. Despite the use of a squeeze roller, there is also a possibility that a certain amount of pickling agent always remains on the horizontal pickling material and is transferred to the next cell containing the cleaning agent. Therefore, it is impossible to accurately limit the shortening of the effective pickling length at a reasonable cost.

Therefore, the object of the present invention can be precisely defined while improving the equipment of the type mentioned in the beginning so that the effective pickling length can be changed or set correctly even when only chemical pickling is performed. That is to get various pickling effects.

In order to achieve this object, the plant of the present invention has at least two vertical pickling cells with two vertical lines, each cell being selectively and independently activating and deactivating. Due to the vertical structure requiring small floor space, the maximum pickling length is longer, and the pickling agent acts by activating or deactivating all pickling cells, with the effect essentially determined by an improved method of recovering the pickling agent from the vertical pickling material. You can change the effective length exactly.

An advantage of the preferred embodiment is that each line can be selectively and independently activated and deactivated within at least one line, preferably in all cells. This flexibility makes it possible, of course, to subdivide the possible pickling lengths possible.

According to a preferred embodiment of the installation according to the invention, if at least five pickling cells each having two vertical lines are provided, the effective length can be changed in 10% intervals between 0% and 100%, and thus very accurate You can set the rating.

According to another feature of the invention, the equipment used to bring the material into contact with the pickling liquor also comprises an overflow which causes it to overflow like a waterfall. Overflow provides a simple way of obtaining a descending film of the pickling agent, and since turbulence occurs, the downward film ensures the optimal effect of the pickling agent on the pickling material.

The preferred embodiment of the present invention preferably comprises a high pressure nozzle for injecting the pickling agent supplied by the at least one high pressure pump into the material, in order to increase the pickling effect as required, preferably only when necessary. In one or several pickling cells.

If one line or one whole cell is not used to pickle the material, the plate may be washed or at least the cleaning liquid provided that equipment for contacting the material with the cleaning liquid is provided in at least one line of the at least one pickling cell. This can be kept in the remaining state.

A variant of the installation according to the invention comprising a mist sprayer for contacting the cleaning liquid with the material is suitable for keeping the cleaning liquid in the material without causing any cleaning effect.

In an embodiment in which equipment for supplying and recovering pickling or washing liquid and equipment for storing and / or treating liquids are merged into one facility for all lines of pickling cells, the structure / configuration of the facility can be simplified. .

Here, it is more preferable to combine the equipment for supplying and withdrawing the pickling liquid and / or the washing liquid and the equipment for storing and / or treating the liquids for at least two pickling cells, and in some cases for all pickling cells.

Although more complex than simply activating and / or deactivating each of the lines and cells, the effective pickling length can also be changed using a facility for changing the height of at least one vertical line in at least one pickling cell. . For example, such equipment may be guide rolls or the like that are adjustable in height.

According to another aspect of the invention, the current is supplied to the material in at least one line, preferably in one pickling cell, in order to increase the chemical effect of pickling and / or to carry out a general electrolytic treatment of the material. Equipment for

In the following description, the present invention is explained in more detail with the embodiments shown in the drawings.

1 shows a plant according to the invention with five two-line pickling cells and a coupling system for pickling cells and pickling agents.

2 shows a variant with separate systems for the first three and the last two pickling cells.

3 shows an embodiment according to FIG. 2 with an auxiliary high pressure section;

*** Explanation of symbols for the main parts of the drawing ***

1: Sanitary cleaner 2, 7, 7a, 8: upper deflection roll

3, 3a: pickling cells 4, 6: lines

5: Lower deflection roll 9: Pickling liquid

10: blocking device 11: overflow

12: piping system 13, 13a: pump

14, 14a: tank 15, 15a: squeeze roll

16: high pressure pump 17: high pressure nozzle

The plate-shaped or linear workpieces (1), in particular heated or cooled stainless steel plates, enter the facility via a first deflection roll (2), which are highly refracted in the vertical direction downwards, and the first deflection roll ( 2) belongs to the first line 4 as part of the two-line pickling cell 3. At the lowest point of the pickling cell 3, a lower deflection roll 5 is provided, and the pickled material 1 is refracted greatly in this roll back to the second line 6 of the pickling cell 3 so as to have a second upper deflection. Move toward the roll 7. The second upper deflection roll is shared by both the first pickling cell 3 and the second pickling cell 3a of the installation and includes the deflection rolls of the preceding first pickling cell 3 and the following three pickling cells. Have the same structure. After passing through the three pickling cells that follow, the pickled material exits the facility via the final upper deflection roll 8.

The height of each pickling cell 3, 3a may vary depending on the number of available cells and the desired maximum and / or minimum effective pickling length. In general, however, the effective pickling length of each line, i.e., the length between the highest point of contact with the pickling liquid 9 and the point at which the pickling liquid is separated from the pickling material 1, is between 1 m and 10 m, and between 3 m and 6 m. The height between is the preferred choice, ideally about 3.5m. Thus, an effective pickling length of up to 35 m can be achieved with the desired five pickling cells 3, 3a, and the length in the horizontal direction is about 10 m which is less than one third of the conventional horizontal pickling line length.

Pickling agent (preferably acid or mixing), using the blocking device 10 (preferably a remotely controllable blocking device) of each pickling cell 3, 3a, preferably each line 4, 6 Acid) can be supplied to each of the lines 4 and 6 via the overflow 11. The pickling agent supply of the overflow 11 can be adjustable or completely shut off. The circulation system for the wash liquor that can be used is not illustrated, but the circulation system for the pickling liquor is included in the figure. This circulation system, together with pickling cells 3, 3a and overflow 11 (and / or high pressure nozzle), has an appropriate piping system 12, one or several pumps 13, at least one tank 14. Or a recovery tank and a suitable device, also filters and similar facilities are not shown in FIG. 1. Here the tank 14 can be assigned to all pickling cells 3, 3a as shown in FIG. 1. It is preferred that the squeeze roll 15 is provided on the final deflection roll 8 from which the pickled material 1 is to be pulled out of the installation.

2 and 3 show further embodiments according to the invention in which a separate system is provided for the pickling agent. The first three pickling cells 3, 3a of the installation share a single circulation system characterized by a pump 13a and a suitable tank 14a. On the other hand, the last two pickling cells 3 of the installation shown in FIGS. 2 and 3 are supplied by separate circulation systems comprising a pump 13 and a tank 14. Here, providing the squeeze roll 15a in the transition section between the final pickling cell 3 of the first circulation system 13a, 14a and the first pickling cell 3 of the second circulation system 13, 14 is possible. Also preferred, such a transition occurs through the shared deflection roll 7a. Originally, a separate circulation system can be provided for pickling agents or liquids of any kind used in the cell 3, or all pickling cells or individual pickling cells, groups of pickling cells or individual lines 4, 6 or It may be provided for the media used in one or several pickling cells 3, 3a.

In the case where the effective pickling length is to be shortened by closing the blocking device 10, it is determined which pickling cells 3 and 3a or which lines 4 and 6 to be blocked according to the type of pickling and the desired pickling characteristics. In most cases the shortening is started by blocking the end area of the installation where the sanitary cleaner 1 enters.

Along with the overflow 11 overflowing into a waterfall form, it creates a turbulent downward membrane with higher pickling efficiency and thereby enables more efficient use of the acid used and / or the use of a smaller size pump, etc. High pressure nozzles 17 may also be provided which spray the pickling agent supplied to the plate or wire rod from the circulation systems 13a and 14a via the high pressure pump 16 (see FIG. 3). This further increases the pickling efficiency. If it is necessary to spray a cleaning solution, such as water, to the pickling agent 1 in such a cell 3, 3a, such a nozzle 17 may also be used, and the pickling agent may be supplied so that the cleaning solution remains in the material in such a cell. Abort.

Another method of changing the effective pickling length is to change the height at which the pickling material is brought into contact with the pickling agent in the vertical partitions of the respective pickling cells 3 and 3a. The effective pickling length can be changed by changing the height of the overflow 11 and / or the high pressure nozzle with respect to the lower roll 5 of each pickling cell. The overflow 11 and / or the high pressure nozzle 17 and / or the lower deflection roll 5 can be adjusted in height, but it is desirable to adjust the height of the lower deflection roll 5.

In order to enhance the pickling effect and / or to carry out electrolytic pickling or to enable other types of electrolytic treatment while maintaining the above-mentioned advantages, each cell or all the cells 3, 3a of the plant according to the present invention may be treated with an anti-acid cleaner. It may also include a device for supplying current to 1).

It is possible to obtain a pickling effect that can be precisely defined and varied by changing or accurately setting the effective pickling length even in the case of chemical pickling alone while maintaining a structure that can save space in the installation.

Claims (11)

In a plate or wire pickling device having a guide mechanism for the material of the various loops having a vertical partition and a mechanism for contacting the pickling liquid with the material, Two vertical pickling cells 3, 3a are provided, each of which has two vertical lines 4, 6, which can be selectively and independently activated and deactivated. Plate or wire rod pickling device. 2. The plate or material according to claim 1, wherein each of the lines 4, 6 is selectively activated and deactivated selectively and independently of each other in the at least one cell, preferably in all the cells 3, 3a. Wire rod pickling device. The method of claim 1 or 2, characterized in that at least five pickling cells (3, 3a) are provided, each of which has two vertical lines (4, 6). Plate or wire rod pickling device. 4. The device according to any one of the preceding claims, characterized in that the equipment used to contact the material (1) with the pickling liquor also comprises an overflow (11) which causes it to overflow like a waterfall. Plate or wire rod pickling device. 5. The high pressure nozzle (17) according to claim 4, further comprising a high pressure nozzle (17), preferably one or several picklings at the inlet of the installation, in order to spray the pickling agent supplied by the at least one high pressure pump (16) onto the material (1). Plate or wire pickling device, characterized in that provided in the cell (3, 3a). 6. Equipment according to any one of the preceding claims, wherein at least one line (4, 6) of at least one pickling cell (3, 3a) is provided with equipment for contacting the material (1) with a wash liquor. Plate or wire rod pickling device, characterized in that. 7. A plate or wire pickling apparatus according to claim 6, characterized in that a mist sprayer is provided for bringing the cleaning liquid into contact with the material (1). 8. The liquid according to any one of claims 1 to 7, for supplying and recovering pickling liquid or washing liquid, and for all lines 4, 6 of one pickling cell (3, 3a) Plate or wire pickling apparatus, characterized in that the equipment (10, 11, 12, 13, 14) for storage and / or processing is combined into one facility. The method according to claim 8, for supplying and recovering pickling liquids and / or washing liquids for at least two pickling cells 3, 3a, and optionally for all of the pickling cells 3, 3a, and A plate or wire pickling apparatus, characterized in that the equipment (10, 11, 12, 13, 14) for storing and / or treating liquid is combined in one facility. 10. Apparatus according to any one of the preceding claims, characterized in that equipment for changing the height of at least one vertical line (4, 6) is provided in at least one pickling cell (3, 3a). Plate or wire rod pickling device. The device according to claim 1, wherein the equipment for supplying current to the material 1 is provided in at least one line 4, 6, preferably in one pickling cell 3, 3a. Plate or wire rod pickling device, characterized in that.